In theory it's possible to go to Dubai - it's open, there are flights and it's currently one of the few places you can visit without having to quarantine on return to the UK. I probably won't risk it though...!
They recently announced the 2021 calendar:
24H Dubai 14-16 Jan
6H Abu Dhabi 22-23 Jan
12H Mugello 26-27 Mar
12H Spa 24-25 Apr
12H Hockenheim 22-23 May
24H Portimao 9-11 Jul
24H Barcelona 3-5 Sep
12H Pergusa 2-3 Oct
24H Sebring 12-14 Nov
Sebring is an interesting addition. I'm definitely going to try to get to Portimao and Barcelona (which just for once don't clash with 9 other GT events each).
http://www.dailysportscar.com/2020/1...-calendar.html